Computational Modeling of Heat and Mass Transfer in Planar SOFC: Effects of Volatile Species/Oxidant Mass Flow Rate and Electrochemical Reaction Rate

Computational Modeling of Heat and Mass Transfer in Planar SOFC: Effects of Volatile Species/Oxidant Mass Flow Rate and Electrochemical Reaction Rate

Bibliographic Details
Main Author: VENKATA, PADMA PRIYA
Language:English
Published: University of Cincinnati / OhioLINK 2008
Subjects:
Mechanical Engineering
SOFC
Solid oxide fuel cells
ASR
interconnect
CFD
heat and mass transfer
electrochemistry
Online Access:http://rave.ohiolink.edu/etdc/view?acc_num=ucin1205169104
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spelling ndltd-OhioLink-oai-etd.ohiolink.edu-ucin12051691042021-08-03T06:12:23Z Computational Modeling of Heat and Mass Transfer in Planar SOFC: Effects of Volatile Species/Oxidant Mass Flow Rate and Electrochemical Reaction Rate VENKATA, PADMA PRIYA Mechanical Engineering SOFC Solid oxide fuel cells ASR interconnect CFD heat and mass transfer electrochemistry A three dimensional computational model of an intermediate temperature planar, tri-layered solid oxide fuel cell is considered for a steady incompressible fully developed laminar flow in the interconnect ducts of rectangular cross section. A constant supply of volatile species (80% H2 + 20% H2O vapor) and oxidant (20% O2 + 80% N2) is maintained at the electrolyte surface on the anode and cathode side respectively. The governing equations of mass, momentum and energy coupled with the electrochemical species equations are solved computationally. Darcy-Forchheimer model is used to account for the porosity effects of the electrodes where the flow is in thermal equilibrium with the solid matrix. The anode-side triple phase boundary is resolved as a finite region to accurately capture the physics of electrochemical reaction which results in current generation and volumetric heat dissipation. Parametric effects of the interconnect contact design and channel aspect ratio on the variation of thermal-hydrodynamic and electrical performances of the cell are presented. The effect of the flow rate and duct aspect ratio on the area-specific resistance and its subsequent effects on current density, temperature and mass/species distributions, flow friction factor and convective heat transfer coefficient are presented. Interconnect channels of cross-section aspect ratio ~0.5-2.0 and interconnect channel half width of 500 µm are compared for overall electrical and convective cooling performance of the planar anode-supported SOFC. 2008-04-22 English text University of Cincinnati / OhioLINK http://rave.ohiolink.edu/etdc/view?acc_num=ucin1205169104 http://rave.ohiolink.edu/etdc/view?acc_num=ucin1205169104 unrestricted This thesis or dissertation is protected by copyright: all rights reserved. It may not be copied or redistributed beyond the terms of applicable copyright laws.
collection NDLTD
language English
sources NDLTD
topic Mechanical Engineering
SOFC
Solid oxide fuel cells
ASR
interconnect
CFD
heat and mass transfer
electrochemistry
spellingShingle Mechanical Engineering
SOFC
Solid oxide fuel cells
ASR
interconnect
CFD
heat and mass transfer
electrochemistry
VENKATA, PADMA PRIYA
Computational Modeling of Heat and Mass Transfer in Planar SOFC: Effects of Volatile Species/Oxidant Mass Flow Rate and Electrochemical Reaction Rate
author VENKATA, PADMA PRIYA
author_facet VENKATA, PADMA PRIYA
author_sort VENKATA, PADMA PRIYA
title Computational Modeling of Heat and Mass Transfer in Planar SOFC: Effects of Volatile Species/Oxidant Mass Flow Rate and Electrochemical Reaction Rate
title_short Computational Modeling of Heat and Mass Transfer in Planar SOFC: Effects of Volatile Species/Oxidant Mass Flow Rate and Electrochemical Reaction Rate
title_full Computational Modeling of Heat and Mass Transfer in Planar SOFC: Effects of Volatile Species/Oxidant Mass Flow Rate and Electrochemical Reaction Rate
title_fullStr Computational Modeling of Heat and Mass Transfer in Planar SOFC: Effects of Volatile Species/Oxidant Mass Flow Rate and Electrochemical Reaction Rate
title_full_unstemmed Computational Modeling of Heat and Mass Transfer in Planar SOFC: Effects of Volatile Species/Oxidant Mass Flow Rate and Electrochemical Reaction Rate
title_sort computational modeling of heat and mass transfer in planar sofc: effects of volatile species/oxidant mass flow rate and electrochemical reaction rate
publisher University of Cincinnati / OhioLINK
publishDate 2008
url http://rave.ohiolink.edu/etdc/view?acc_num=ucin1205169104
work_keys_str_mv AT venkatapadmapriya computationalmodelingofheatandmasstransferinplanarsofceffectsofvolatilespeciesoxidantmassflowrateandelectrochemicalreactionrate
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